
export class HexSha1Utils {
  /**
   * 将字符串进行sha1加密
   * @param str 字符串
   * @returns 返回加密后的字符串
   */
  static hexSha1Utf8(s) {
    var data = new Uint8Array(HexSha1Utils.encodeUTF8(s))
    var i, j, t
    var l = ((data.length + 8) >>> 6 << 4) + 16
    s = new Uint8Array(l << 2)
    s.set(new Uint8Array(data.buffer))
    s = new Uint32Array(s.buffer)
    for (t = new DataView(s.buffer), i = 0; i < l; i++) s[i] = t.getUint32(i << 2)
    s[data.length >> 2] |= 0x80 << (24 - (data.length & 3) * 8)
    s[l - 1] = data.length << 3
    var w = [], f = [
      () => {
        return m[1] & m[2] | ~m[1] & m[3]
      },
      () => {
        return m[1] ^ m[2] ^ m[3]
      },
      () => {
        return m[1] & m[2] | m[1] & m[3] | m[2] & m[3]
      },
      () => {
        return m[1] ^ m[2] ^ m[3]
      }
    ], rol = (n, c) => {
      return n << c | n >>> (32 - c)
    },
      k = [1518500249, 1859775393, -1894007588, -899497514],
      m = [1732584193, -271733879, null, null, -1009589776]
    m[2] = ~m[0]
    m[3] = ~m[1]
    for (i = 0; i < s.length; i += 16) {
      var o = m.slice(0)
      for (j = 0; j < 80; j++) {
        w[j] = j < 16 ? s[i + j] : rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1),
        t = rol(m[0], 5) + f[j / 20 | 0]() + m[4] + w[j] + k[j / 20 | 0] | 0,
        m[1] = rol(m[1], 30), m.pop(), m.unshift(t)
      }
      for (j = 0; j < 5; j++) m[j] = m[j] + o[j] | 0
    }
    t = new DataView(new Uint32Array(m).buffer)
    for (var x = 0; x < 5; x++) m[x] = t.getUint32(x << 2)

    var hex = Array.prototype.map.call(new Uint8Array(new Uint32Array(m).buffer), function (e) {
      return (e < 16 ? '0' : '') + e.toString(16)
    }).join('')
    return hex
  }

  /**
   * 将字符串utf-8
   * @param s 字符串
   * @returns utf-8之后的字符串
   */
 private  static encodeUTF8(s: string) {
   var i, r = [], c, x
   for (i = 0; i < s.length; i++) {
     if ((c = s.charCodeAt(i)) < 0x80) r.push(c)
     else if (c < 0x800) r.push(0xC0 + (c >> 6 & 0x1F), 0x80 + (c & 0x3F))
     else {
       if ((x = c ^ 0xD800) >> 10 == 0) {
         // 对四字节UTF-16转换为Unicode
         c = (x << 10) + (s.charCodeAt(++i) ^ 0xDC00) + 0x10000
         r.push(0xF0 + (c >> 18 & 0x7), 0x80 + (c >> 12 & 0x3F))
       } else {
         r.push(0xE0 + (c >> 12 & 0xF))
       }
       r.push(0x80 + (c >> 6 & 0x3F), 0x80 + (c & 0x3F))
     }
   }
   return r
  }
}